The conclusion should be several paragraphs addressing the following: The locati

Question

The conclusion should be several paragraphs addressing the following: The location where the water sample was obtained; the phosphate concentration and pH of the water sample before and after purification; a discussion of the possible reasons for the phosphate concentration level and for the pH value of the water sample before and after; in other words what might be causing these values. Discuss the "purity" of your water sample before treatment. As always, discuss any possible errors in the experiment. Answer the following questions: Why should we care about the amount of PO_4^3- found in a natural water source? If you really wanted to be sure your water was drinkable, what further purification step(s) would you take? Blue light has a wavelength between 450-495 nm. Why don't we measure the absorbance of a blue solution within this wavelength range?

Explanation / Answer

1. Phosphate ion PO4- is harmful for plants and algae. Mixing of phosphate ions in water develops algal blooms. Algal blooms deoxygenate the water that kills the fishes. Also algal blooms soak up all of the sunlight and nutrients, killing off all of the native plants.

Thus phosphate ions are very harmful for ecosystem.

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